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He served as a union representative at Port Botany bus depot and his death has left former work mates devastated.

"Vale. Peter Hofmann has tragically passed away. Our condolences to all of Peter's friends and family," the Port Botany Bus Institute posted online, along with a memo from the depot manager offering counselling to other drivers.

NSW Police on Tuesday raided a property in Portland Crescent in connection to the investigation after Strikeforce Perrey was established to investigate the crime.

Inquiries are ongoing and police are calling for witnesses to come forward.